[PATCH] D53486: [libcxx] Only define __libcpp_is_floating_point<_Float16> for Clang

[Petr Hosek via Phabricator]

phosek added a subscriber: peter.smith.
phosek added a comment.

I don't know why we chosen that approach, but Arm Compiler Reference Guide <http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.100067_0610_00_en/sex1519040854421.html> explicitly mentions that `_Float16` is being available in C and C++. @peter.smith might know why that's the case?

Do you have any other suggestion on how to handle this?


Repository:
  rCXX libc++

https://reviews.llvm.org/D53486